Magneto-electric machine



1,51%,926 March 1927 A. F. GERDES MAGNETO ELECTRI C MACHINE Filed Feb.1, 1922 2 Sheets-Sheet 1 E12 men Mr.-

1 $9,925 March 3, 1927'. A. F. GERDES 9 v MAGNETO ELECTRIC IxiIaGZ-IINEFiled Feb. 1, 1922 2 Sheets-Sheet 2 1467955 lf Gg rdg Patented Mar. 8,1927 UNITED STATES v 1,619,926 PATENT OFFICE...

ADQLF FRIEDRICH GERDES, OF BERLIN, GERMANY.

MAGNETIC-ELECTRIC MACHINE.

i Application filed February 1, 1922, Serial No. 533,394, and inGermany-Tune 20, 1816.

Magneto-electric machines, in which the field-magnets are composed of aplurahty of ermanent magnets, are already known. Elachines of this kindhave hitherto been constructed in such a manner that the pole pieces ofthe single permanent magnets were ma etically connected together withtheir en s having the same polarity in close tproximity to the armature.It has been ound b different tests, that the efiiciency of a. macl iineof this kind is considerably increased,

' it, as in the case of the present invention, the

'nent magnet. For the fit into the said several unipolar ends of thepermanent magnets lying in juxtaposition are completely insulated fromeach other, as far as the magnetic conductivity is concerned and if atthe same time the permanent magnets are .arranged at a greater distancefrom each other than the air-space and the armature, and if finally thearmature-eore is composed of completely insulated aggregates ofiron-sheets, each of which is mounted in opposition to a permapurpose ofincreasing the surface of the pole pieces each aggregate of the armaturemay be provided with a wedge-shaped groove and the sharpened ends'of thepole surfaces of the magnets may dentations.

The formation of eddy-currents by the field-pole-surfaces arranged in azigzag-line and by the pole-surfaces of the armature are avoided byarranging the single insulated aggregates in the direction of themagnetic line of force in opposition to the sharpened ends of thefield-magnet-poles.

The magneto-electric machine forming the object of the present inventionis represented in the annexed drawing by way of exam le, in which:

l i 1 is a longitudinal section approximate y along the l1ne 11 of Fig.2,

Fig. 2 is a view showin the armature in transverse section approximatelyalong the line 2-2 of Fig. 1,

Fig. 3 shows a modification in longitudinal section approximately alongthe line 3-3 of Fig. 4,

Fig. 4 is a. view showing the armature in transverse sectionapproximately along, the line 4-4 of Fig. 3,

Fi 5 is an enlarged detail view of the modi%cation of Figs. 3 and 4 andFig. 6 is a diagrammatic view of the lines of force.

between the field poles.

wedge-shaped grooves or in- The field body of the representedmagnetoelectric machine is composed of a plurality of permanent steelmagnets N S connected together by the non-conducting bolts 1, 2 and 3and the uniformly shaped collars 4 at a suitable distance from oneanother; the connection being such that the pole-ends of the permanentmagnets lying at the same side will show the same polarity. The core 5of the armature is composed of an aggregate of iron-sheets. sulated fromeach other by extra-strong insulating discs 6, so that each of theseaggregates revolves between the poles of a single permanent magnet.According .to the modification shown in Figs. 3, .4 and 5 each aggregateis provided in its periphery with a groove which coacts with thepole-surfaces of the magnets of the field-body, which have similarcontour in cross-section as the said aggregates of iron-sheets which areoppositely arranged to the poles of the field-magnets in the directionof the exit of the lines of force. For the purpose of accommodating thefield-pole-surfaces to the zigzag-shaped pole-surfaces of the armature,the field-body consists of two arts which may be connected by a bolt 3 Fthat both parts may be brought nearer-toig. 4) acting as a hinge so- Theaggregatesare incessity occurs.

It is to be understood that wherever permanent magnets are mentionedelectro-magnets may also be used in place of the I claim: 1

1. In a magneto-electric machine, a field magnet structure and anarmature coacting with the pole pieces thereof, said structureconsisting of a plurality of independent magnets each composed of aplurality of parts adjustably connected together, said magnets beingmagnetically insulated from each other and each separated from adjacentmagnets by a distance greater than that which separates the pole piecesfrom the armature, said armature being composed of a plurality ofinsulated aggregates each coacting with one of the magnets.

2. In a magneto-electric machine, a field magnet structure and anarmature coacting with the pole pieces thereof, said structureconsisting of a plurality of independent magnets each composed of twoparts adjustably connected to ether, said magnets being magneticallyinsu ated from each other and eac separated'from adjacent magnets by a Qlemme distance greater than that which separates ing magneticallyinsulated from each other the pole pieces from the armature, and saidand each separated from adjacent magnets armature being composed of aplurality of by a distance greater than that which sepa- 15 insulatedaggregates'each coacting with one rates the pole from the armature andof the magnets. said armature ing composed of a plurality '3. In amagneto-electric machine, a field of insulated aggregates each having inits magnet structure and an armature coacting periphery a wedge shapedgroove coacting v wit the pole pieces thereof, said structure with thesimilarly shaped pole pieces of one 20 consisting of a plurality ofindependent of the magneis.

magnets each composed of'two parts ad- In witness whereof I havesubscribed my justably connected together, and having name. wedge shapedpole pieces, said magnets be- ADOLF FRIEDRICH GERDES.

